section {
    width: 90%;
    min-width: 1200px;
    height: 600px;
    margin: auto;
    padding: 50px;
}
.banner img{
    width: 100%;
}
section.about img {
    float: right;
}

section.about {
    width: 60%;
    min-width: 1060px;
    padding: 100px 0;
}

.about .text {
    display: inline-block;
    width: 50%;
    text-align: center;
}

.about .text h4 {
    width: 80%;
    font-size: 28px;
    color: #333333;
    margin-bottom: 20px;
    padding-bottom: 20px;
    font-weight: normal;
    position: relative;
}

.about .text h4:after {
    content: '';
    display: inline-block;
    width: 50px;
    height: 2px;
    background-color: #ff0;
    position: absolute;
    bottom: 0;
    left: 184px;
}

.about .text .info {
    width: 80%;
    font-size: 16px;
    color: #666666;
    text-align: left;
    line-height: 32px;
}

section.mid {
    padding: 0;
    margin: 0;
    width: 100%;
    background: url(../image/about_us_classification.png) no-repeat center center/100% 100%;
}

section.mid .content {
    width: 64%;
    height: 300px;
    margin: auto;
    display: flex;
}

section.mid .content .mid-text {
    width: 33%;
    height: 100%;
    text-align: center;
    margin-top: 230px;
}

section.mid .content .mid-service {
    margin-left: 18px;
}

section.mid .content .mid-text h4 {
    font-size: 24px;
    color: #000;
    font-weight: normal;
    margin-bottom: 20px;
}

section.mid .content .mid-text p {
    font-size: 12px;
    color: #808080;
}

section.last-img {
    height: 760px;
    text-align: center;
    background: url(../image/about_us_shouji_bg.png) no-repeat center center/100%;
}

section.last-img img {
    width: 700px;
}